Water Calculators
Volume math for pools, tanks, and pipes. Pool volume handles five shape modes including kidney and custom freeform. Tank volume covers vertical and horizontal cylinders, rectangular tanks, and capsule shapes. Pipe volume works for any cylindrical pipe, with a reference table for common PVC, copper, and PEX sizes. Gallons-per-minute flow handles bucket-fill timing and conversion between common flow units. Liters-per-minute is next on the build list. Imperial and metric throughout.
Pool Volume Calculator
Total gallons or liters for rectangle, circle, oval, kidney, and custom-shape pools. Handles separate shallow and deep depths. Imperial and metric.
Tank Volume Calculator
Total gallons or liters for vertical and horizontal cylinders, rectangular tanks, and capsule (rounded-end) tanks. Imperial and metric.
Pipe Volume Calculator
Total gallons or liters in any cylindrical pipe from inner diameter and length. Reference table for common PVC, copper, and PEX sizes. Imperial and metric.
Gallons Per Minute Calculator
Find GPM from a bucket fill or convert any flow rate using NIST factors. Source units include LPM, CFS, GPH, MGD, L/s, and m³/h.